首页
登录
职称英语
Why did the sugar cane farmers bring cane toads to Australia? [br] [originaltex
Why did the sugar cane farmers bring cane toads to Australia? [br] [originaltex
游客
2024-10-09
5
管理
问题
Why did the sugar cane farmers bring cane toads to Australia? [br]
Perhaps the most unusual animal ever brought to Australia was the cane toad. It is a large and ugly species of toad and was imported to this country by sugar cane farmers in 1935 [18B] to get rid of the beetles which killed the sugar cane plants.
The cane beetle is the natural enemy of the sugar cane plant. It lives in the cane and drops its eggs onto the ground around the base of the cane. The eggs develop into worms and then the worms eat the roots of the cane, resulting in the death of the plant. In the mid 30s there was a serious outbreak of cane beetles and the farmers became desperate to get rid of the pest which was ruining their livelihood.
Meanwhile it was reported that a toad, native to Central America, had been taken to Hawaii, where cane is also grown, and introduced with apparent success. So the Australian farmers arranged to import one hundred toads from Hawaii. The toads were then released into the cane fields to kill cane beetles.
As predicted, the toads started to breed successfully and within a very short time their numbers had swollen. But there was one serious problem. It turned out that [20A] cane toads did not eat cane beetles. And the reason for this is that toads live on insects that are found on the ground and the cane beetle lives at the top of the cane plant well out of reach of the toads. In fact they never come into contact with each other.
选项
A、Their houses were destroyed by cane beetles.
B、Cane beetles dropped their eggs onto the ground around the base of the plant.
C、Cane beetles killed all their livelihood.
D、Their sugar cane plants were ruined by overwhelming beetles.
答案
D
解析
文中提到,在30年代中期,蔗虫泛滥(there was a serious outbreak of the cane beetle),这让农夫们很绝望,因为它们毁掉了农夫们的营生(ruining their livelihood),即甘蔗,故答案为[D]。
转载请注明原文地址:https://tihaiku.com/zcyy/3794089.html
相关试题推荐
WhatdestroyedSaint-Pierre?[br][originaltext]PeoplesaidthatSaint-Pie
Whatisthemainsubjectofthistalk?[br][originaltext]Goodafternoon,
Whatisthemainsubjectofthistalk?[originaltext]Goodafternoon,andI’
Whatistheconversationfocusedon?[br][originaltext]W:Ipersonally,um,do
Accordingtothepolls,whichpartytakestheleadatpresent?[originaltext]
Whothespeakerspeakingto?[br][originaltext]MayIhavetheattentionof
Whothespeakerspeakingto?[br][originaltext]MayIhavetheattentionof
[originaltext]TeachingandLearning
whyistheweightlossplancalledtheScarsdalediet?[originaltext]Thela
Whatisthetalkmainlyabout?[br][originaltext]The23rdOlympicgameswe
随机试题
[originaltext](19)Conditionsforgrowingpumpkinswerepoorinsomeareas
It’s3am,pitchdarkandyoucan’tsleep.Howcanyousurvivethenextday
[A]classified[B]conducted[C]dieting[D]earlier[E]later[F]less[G]
PeerMediation(调解)onCampusThingshavenotgonewellla
[audioFiles]audio_eufm_j42_001(20082)[/audioFiles]A、Thewomanissorrytobeil
A.1/3 B.2/3 C.1/2 D.1/4
小儿尿路感染急性期,肝胆郁热证的治法是( )。A.滋阴补肾 B.健脾益气
关于pH对酶促反应速度影响的论述,错误的是A.pH影响酶、底物或辅助因子的解离程
就境内持仓分析来说,按照规定,国境期货交易所的任何合约的持仓数量达到一定数量时,
护肩路基砌筑的护肩高度一般应()。A.不小于1.0m B.不大于1.0m
最新回复
(
0
)